21276346 has 16 divisors (see below), whose sum is σ = 39279744. Its totient is φ = 8416944.

The previous prime is 21276337. The next prime is 21276347. The reversal of 21276346 is 64367212.

It is a super-2 number, since 2×21276346² = 905365798223432, which contains 22 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (21276347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58270 + ... + 58633.

It is an arithmetic number, because the mean of its divisors is an integer number (2454984).

Almost surely, 2^21276346 is an apocalyptic number.

21276346 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21276346 is a deficient number, since it is larger than the sum of its proper divisors (18003398).

21276346 is a wasteful number, since it uses less digits than its factorization.

21276346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116925.

The product of its digits is 12096, while the sum is 31.

The square root of 21276346 is about 4612.6289683867. The cubic root of 21276346 is about 277.0973344550.

The spelling of 21276346 in words is "twenty-one million, two hundred seventy-six thousand, three hundred forty-six".